參數(shù)資料
型號(hào): MC33889
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: System Basis Chip (SBC) with Low Speed Fault Tolerant CAN Interface
中文描述: 帶有低速CAN的精簡版系統(tǒng)基礎(chǔ)芯片
文件頁數(shù): 22/30頁
文件大小: 464K
代理商: MC33889
PC33889
22
PC33889
7.2
Register description
7.2.1
MCR Register
Control bits
(1): Bit BATFAIL cannot be set by SPI. BATFAIL is set when Vsup falls below 3V.
(2): Watchdog ON or OFF depends upon RCR register bit D3.
(3): Before entering sleep mode, bit NOSTOP in RCR register must be previously set to 1.
Status bits
MCR
D3
D2
D1
D0
$000b
W
MCTR2
MCTR1
MCTR0
R
BATFAIL
VDDTEMP
GFAIL
WDRST
Reset
0
0
0
0
Reset condition
Table 7-2.
POR, RESET
POR, RESET
POR, RESET
MCTR2
MCTR1
MCTR0
SBC mode
Description
0
0
0
Enter/leave debug mode
To enter debug mode, SBC must be
in Normal or Standby mode and
BATFAIL
(1)
must be still at 1. To
leave debug mode, BATFAIL must
be at 0.
0
0
1
Normal
0
1
0
Standby
0
1
1
Stop, watchdog off
(2)
0
1
1
Stop, watchdog on
(2)
1
0
0
Sleep
(3)
1
0
1
Normal
No watchdog running, debug mode
1
1
0
Standby
1
1
1
Stop
Status bit
Description
GFAIL
Logic OR of CAN failure, HS1 failure, V2LOW
BATFAIL
Battery fail flag (Vsup<3V)
VDDTEMP
Temperature pre-warning on VDD (latched)
WDRST
Watchdog reset occurred
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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